KH\ròðÚù& 240KH.\r147. úûð`üÊýþôÿ450 0@P2 `p?\n180P\r??P\r0@`p \r 0@x `p.\r180 450\r2 x\r180x=2X450\r2x450\rx=5\r" 7 9 # $ 8 1 #.\r% 0@5 `p.\r148. *+,-./01230P4p56P7`p?24P15`p9:;p<6,\r>?@A\n2 5 % , :;p\nCD`p \r :;p\nx `p\r24X 1 - 25% x =24X 15\r18x=24X15\rx=20\r% :;p\n20`p.\r149. KLL1*M`NO.4PQRN.4pSO7`p?90P2 `p.:\r;pTUVNP7`pWX?60PCD`p:; Z[\ \r x `p:;P\r60x=90X2\rx=3\r% 3 `p:;.\r150. *^_`abc d_e4800P_fg e2 3 , h\r^bc ij\r 2+3=5\r48004-2=2400 \r2400* 32 X 2400x30\r=960X1440\r= 1382400 m` \r% \r^c ije1382400m`.\r" 8 0 # $ 8 1 #.\r" 8 1 # $ 8 1 #
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